The indexes selected for the query. For example: [ {"queryScope": "Collection", "properties": "(foo ASC, name ASC)"}, {"queryScope": "Collection", "properties": "(bar ASC, name ASC)"} ]
Debugging statistics from the execution of the query. Note that the debugging stats are subject to change as Firestore evolves. It could include: { "indexes_entries_scanned": "1000", "documents_scanned": "20", "billing_details" : { "documents_billable": "20", "index_entries_billable": "1000", "min_query_cost": "0" } }
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-06-20 UTC."],[],[],null,["# ExplainMetrics\n\nExplain metrics for the query.\n\n| JSON representation |\n|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| ``` { \"planSummary\": { object (/docs/firestore/reference/rest/v1/ExplainMetrics#PlanSummary) }, \"executionStats\": { object (/docs/firestore/reference/rest/v1/ExplainMetrics#ExecutionStats) } } ``` |\n\n| Fields ||\n|------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `planSummary` | `object (`[PlanSummary](/docs/firestore/reference/rest/v1/ExplainMetrics#PlanSummary)`)` Planning phase information for the query. |\n| `executionStats` | `object (`[ExecutionStats](/docs/firestore/reference/rest/v1/ExplainMetrics#ExecutionStats)`)` Aggregated stats from the execution of the query. Only present when [ExplainOptions.analyze](/docs/firestore/reference/rest/v1/ExplainOptions#FIELDS.analyze) is set to true. |\n\nPlanSummary\n-----------\n\nPlanning phase information for the query.\n\n| JSON representation |\n|-------------------------------------------|\n| ``` { \"indexesUsed\": [ { object } ] } ``` |\n\n| Fields ||\n|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `indexesUsed[]` | `object (`[Struct](https://protobuf.dev/reference/protobuf/google.protobuf/#struct)` format)` The indexes selected for the query. For example: \\[ {\"queryScope\": \"Collection\", \"properties\": \"(foo ASC, **name** ASC)\"}, {\"queryScope\": \"Collection\", \"properties\": \"(bar ASC, **name** ASC)\"} \\] |\n\nExecutionStats\n--------------\n\nExecution statistics for the query.\n\n| JSON representation |\n|------------------------------------------------------------------------------------------------------------------------|\n| ``` { \"resultsReturned\": string, \"executionDuration\": string, \"readOperations\": string, \"debugStats\": { object } } ``` |\n\n| Fields ||\n|---------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `resultsReturned` | `string (`[int64](https://developers.google.com/discovery/v1/type-format)` format)` Total number of results returned, including documents, projections, aggregation results, keys. |\n| `executionDuration` | `string (`[Duration](https://protobuf.dev/reference/protobuf/google.protobuf/#duration)` format)` Total time to execute the query in the backend. A duration in seconds with up to nine fractional digits, ending with '`s`'. Example: `\"3.5s\"`. |\n| `readOperations` | `string (`[int64](https://developers.google.com/discovery/v1/type-format)` format)` Total billable read operations. |\n| `debugStats` | `object (`[Struct](https://protobuf.dev/reference/protobuf/google.protobuf/#struct)` format)` Debugging statistics from the execution of the query. Note that the debugging stats are subject to change as Firestore evolves. It could include: { \"indexes_entries_scanned\": \"1000\", \"documents_scanned\": \"20\", \"billing_details\" : { \"documents_billable\": \"20\", \"index_entries_billable\": \"1000\", \"min_query_cost\": \"0\" } } |"]]
